MASTR B&C Classes Downgraded

Three classes from two deals issued by Mortgage Asset Securitization Transactions Asset Back Securities Trust have been downgraded by Fitch Ratings.The downgrades were as follows: series 2002-OPT1, class M-6, from BB-minus to CCC/DR3; and series 2004-WMC1, class M-4, from BBB-plus to BB, and class M-5, from BBB to B. Fitch also affirmed the ratings on seven other classes in the two deals. The downgrades were attributed to deterioration in the relationship between credit enhancement and expected losses. The collateral for the transactions consists primarily of first- and second-lien subprime mortgage loans.